Triangle of signed numbers used for the computation of the column sequences of triangle A090215.

A089515

Triangle of signed numbers used for the computation of the column sequences of triangle A090215.

Terms

    a(0) =1a(1) =-1a(2) =5a(3) =1a(4) =-35a(5) =90a(6) =-3a(7) =595a(8) =-6885a(9) =12005a(10) =143a(11) =-150535a(12) =6175845a(13) =-39484445a(14) =52245760a(15) =-58201a(16) =316465625a(17) =-42458934375a(18) =772604284375a(21) =216931a(22) =-6012846875

External references